1. An example of such behavior is the 3D ferromagnetic phase transition. 2. Magnetic hysteresis loops are not exclusive to materials with ferromagnetic ordering. 3. Materials where these spins align in the same direction are ferromagnetic . 4. Low temperature ferromagnetic transitions for Tb, Dy, Ho and Er. 5. Ferroelectric crystals often show several transition temperatures and ferromagnetic crystals. 6. Only ferromagnetic , antiferromagnetic, and diamagnetic materials can satisfy this condition. 7. However being ferromagnetic its permeability is about 10, 000 times greater. 8. Thus coercivity measures the resistance of a ferromagnetic material to becoming demagnetized. 9. The disc consists of a ferromagnetic material sealed beneath a plastic coating. 10. This ferromagnetic / antiferromagnetic oscillation is one prediction of the RKKY theory.
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